forex trading: fx educational web sites

1.
I am interested to start trading forex, both currency futures and, if possible, other instruments, like CFD, FX on interbank (however I doubt private traders can do it...)
May I have some suggestions?

2.
Do you have any experience about ifx, London based, who claim to be the largests FX market maker?
How can they provide commission-free?www.ifx.co.uk

3.
Can you recommend some serious, educational web site for learning to trade currencies?